TDRSS lightcurve for Trigger=1216745
Notes:
- 1) None of the TDRSS light curves are background subtracted.
GCN BAT Position Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 21 Feb 24 22:24:33 UT
NOTICE_TYPE: Swift-BAT GRB Position
TRIGGER_NUM: 1216745, Seg_Num: 0
GRB_RA: 245.544d {+16h 22m 11s} (J2000),
245.888d {+16h 23m 33s} (current),
244.833d {+16h 19m 20s} (1950)
GRB_DEC: -15.719d {-15d 43' 07"} (J2000),
-15.774d {-15d 46' 26"} (current),
-15.602d {-15d 36' 06"} (1950)
GRB_ERROR: 3.00 [arcmin radius, statistical only]
GRB_INTEN: 0 [cnts] Image_Peak=4225 [image_cnts]
TRIGGER_DUR: 64.000 [sec]
TRIGGER_INDEX: 20000 E_range: 15-50 keV
BKG_INTEN: 0 [cnts]
BKG_TIME: 0.00 SOD {00:00:00.00} UT
BKG_DUR: 0 [sec]
GRB_DATE: 20361 TJD; 52 DOY; 24/02/21
GRB_TIME: 80511.04 SOD {22:21:51.04} UT
GRB_PHI: -86.53 [deg]
GRB_THETA: 0.21 [deg]
SOLN_STATUS: 0x413
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 16.43 [sigma]
MERIT_PARAMS: +1 +0 +0 +6 +1 +4 +0 +0 -5 +0
SUN_POSTN: 334.74d {+22h 18m 57s} -10.48d {-10d 28' 48"}
SUN_DIST: 86.08 [deg] Sun_angle= 5.9 [hr] (West of Sun)
MOON_POSTN: 127.87d {+08h 31m 29s} +23.93d {+23d 55' 50"}
MOON_DIST: 121.56 [deg]
MOON_ILLUM: 94 [%]
GAL_COORDS: 359.41, 23.32 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS: 246.39, 5.74 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS: SWIFT-BAT GRB Coordinates.
COMMENTS: This Notice was delayed by more than 60 sec past the end of the trigger integration interval;
COMMENTS: probably due to it occurring during a Malindi downlink session.
COMMENTS: This is an image trigger. (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)
COMMENTS: A point_source was found.
COMMENTS: This does not match any source in the on-board catalog.
COMMENTS: This does not match any source in the ground catalog.
COMMENTS: This is a GRB.
COMMENTS: This trigger occurred at longitude,latitude = 137.34,-9.52 [deg].
GCN BAT Lightcurve Notice
TITLE: GCN/SWIFT NOTICE
NOTICE_DATE: Wed 21 Feb 24 22:29:54 UT
NOTICE_TYPE: Swift-BAT GRB Lightcurve
TRIGGER_NUM: 1216745, Seg_Num: 0
GRB_RA: 245.544d {+16h 22m 11s} (J2000),
245.888d {+16h 23m 33s} (current),
244.833d {+16h 19m 20s} (1950)
GRB_DEC: -15.719d {-15d 43' 07"} (J2000),
-15.774d {-15d 46' 26"} (current),
-15.602d {-15d 36' 06"} (1950)
GRB_DATE: 20361 TJD; 52 DOY; 24/02/21
GRB_TIME: 80511.04 SOD {22:21:51.04} UT
TRIGGER_INDEX: 20000
GRB_PHI: -86.53 [deg]
GRB_THETA: 0.21 [deg]
DELTA_TIME: 0.00 [sec]
TRIGGER_DUR: 64.000 [sec]
SOLN_STATUS: 0x413
RATE_SIGNIF: 0.00 [sigma]
IMAGE_SIGNIF: 16.43 [sigma]
LC_URL: sw01216745000msb.lc
GCN template for BAT paragraph
Click here!
At 22:21:51 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 240221 ***A*** (trigger=1216745). Swift slewed immediately to the burst.
The BAT on-board calculated location is
RA, Dec 245.544, -15.719 which is
RA(J2000) = 16h 22m 11s
Dec(J2000) = -15d 43' 07"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed a [**double-peaked**]
structure with a duration of about TTT sec. The peak count rate
was ~914 counts/sec (15-350 keV), at ~2 sec after the trigger.
Test version of draft template
Initial TDRSS lightcurve and spacecraft attitude plot
TDRSS lightcurve from T0-30 to T0+50 (zoom in)
TDRSS light curve from T0-1 to T0+2 (More zoom in)
1.6s binned TDRSS light curve
Tilan's background subtracted TDRSS light curves
Extended TDRSS light curve and spacecraft attitude plot(s)
Extended TDRSS lc No.1
Extended TDRSS lc No.2
TDRSS extended lightcurve from T0-1 to T0+2
T50 and T90 calculation
******************************************
battblocks v1.18
------------------------------------------
Input Data: bat_raw_lc.fits
Output GTI: bb.gti
Events to Skip: 128 Changepoint log(prob) Prior: 6.000000
Internal Tick: 1.000000e-04 s
Lookback time: 0 s
Bkg. Subtract?: yes (for fluence/T50/T90 calculations)
------------------------------------------
Estimated background rate 1: 4403.611 near MET 730247024.960000 s
Estimated background rate 2: 4403.611 near MET 730247024.960000 s
Estimated total fluence: 0.000000 count
Created GTI with 1 entries
------------------------------------------
Search for this GRB position to the previously BAT detected GRB positions (search radius within 5 arcmin)
bat_grb_pos_cat.sh 245.544 -15.719 0.083
No match
Search for this GRB position to the source locations in BAT transient monitor (search radius within 12 arcmin)
python compare_catalog.py 245.544 -15.719
No match
Link to SIMBAD
Click here for the SIMBAD search!
Frank's UVOT result
Click here!
Frank's UVOT Blinking images
Click here!
Elevation angle of GRB/Sun at the ground telescope locations
GSFC, Greenbelt, Maryland
TimeUT Azimuth Elevation
Sun: 2024 2 21 22 68.559189 8.971020
Obj: 2024 2 21 22 134.271663 -59.875022
the object visibility at GSFC, Greenbelt, Maryland
MMT Observatory, Mt. Hopkins, Arizona
TimeUT Azimuth Elevation
Sun: 2024 2 21 22 44.509389 35.982347
Obj: 2024 2 21 22 93.715736 -37.000702
the object visibility at MMT, Mt. Hopkins, Arizona
Hale Telescope, Palomar Mountain, California
TimeUT Azimuth Elevation
Sun: 2024 2 21 22 37.590648 38.042797
Obj: 2024 2 21 22 91.480243 -31.887044
the object visibility at Hale Telescope, Palomar Mt., California
Mauna Kea, Hawaii
TimeUT Azimuth Elevation
Sun: 2024 2 21 22 342.268891 58.286099
Obj: 2024 2 21 22 71.566392 4.155182
the object visibility at Mauna Kea, Hawaii
Siding Spring Obs., Australia
TimeUT Azimuth Elevation
Sun: 2024 2 21 22 266.040292 26.832652
Obj: 2024 2 21 22 119.794096 63.162132
the object visibility at Siding Spring Obs., Australia
Tokyo, Japan
TimeUT Azimuth Elevation
Sun: 2024 2 21 22 283.464311 0.982764
Obj: 2024 2 21 22 9.212219 39.303673
the object visibility at Tokyo, Japan
William Herschel Telescope, La Palma, Canary Islands, Spain
TimeUT Azimuth Elevation
Sun: 2024 2 21 22 99.770861 -38.409035
Obj: 2024 2 21 22 257.263968 -53.538967
the object visibility at William Hershel Telescope, La Palma, Canary Islands, Spain
Gemini South, Cerro Pachon, Chile
TimeUT Azimuth Elevation
Sun: 2024 2 21 22 88.218518 18.018288
Obj: 2024 2 21 22 20.752604 -41.398490
the object visibility at Gemini South, Cerro Pachon, Chile
The data/results are in /local/data/bat1/prebascript/trigger1216745/tdrss_ql/
bat_raw_lc.fits : TDRSS FITS light curve from GCN
gcn_position.txt : GCN BAT position notice
ratelc_tdrss.qdp : QDP file of the TDRSS light curve
tdrss_lc.gif : GIF TDRSS light curve
sc_att.qdp : QDP file of the spacecraft attitude
sc_att.gif : GIF spacecraft attitude
bb.gti : Bayesian block GTI file (battblocks)
dur.gti : Duration GTI file (battblocks)
battblocks.log : Output log of battblocks
Plot creation:
Wed Feb 21 17:30:42 EST 2024